AS14306 — GLAXOSMITHKLINE

AS14306 announces 3 IPv4 prefixes covering 768 addresses and 0 IPv6 prefixes.

About this network

A pharmaceutical group's network, announced through a single upstream.

What it's used for

• A pharmaceutical company's network. 768 addresses across three IPv4 prefixes, with one observed BGP neighbour and no IPv6 announced.

Notable

• 152.51.24.0/24 and 152.51.27.0/24 carry the netname GLAXOSMITHKLINE, matching the AS handle exactly.
• The lookup for 152.51.48.0/24 failed, so nothing is known about how that block is registered.
• All three blocks sit inside the same larger range, spread out rather than adjacent.
• Nine addresses were queried for reverse DNS and none returned a name.

Interesting

• Handle, netname and registrant all carrying the same single word is the tidiest possible record, and it happens when a company files its own paperwork rather than letting a provider file it. Merged companies usually leave two names behind; this one shows only the combined name.
• One observed upstream for a group of this size looks thin until you remember that this AS announces 768 addresses. The research and manufacturing networks of a pharmaceutical company are not on the public internet, and what is announced here is a small and carefully chosen exception.
• Spreading three blocks across one range rather than taking a contiguous run suggests they were requested separately, years apart, from space the company already held.
• Nothing published in reverse DNS is the right choice for an industry where the interesting question is which host does what.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 152.51.24.0/24
• 152.51.27.0/24
• 152.51.48.0/24

Upstream networks

• AS10753 Level 3 Parent, LLC

Adjacent networks

• AS10753 Level 3 Parent, LLC